Thermostat.



PATENTED AUG. 6, 1907.

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S. B. POST.

THERMOSTAT.

APPLICATION FILED MAR.13, 1907.

K, E n n D mm D n n Dru m nu m H mm mm mm 0 0 0 0 0 0 u 0 00 ID98765$32 WITNES No. 862,755; PATENTED AUG. 6, 1907. S. B. POST.

THERMOSTAT. Arriidnion rum) MAR.13, 1907.

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4 Mn 5- I WITNES SGHUYLER I BRADLEY POST, OF SYRACUSE, NEW YORK, ASSIGNOR TO JEWELL MANUFACTURING COMPANY, OF AUBURN, NEW YORK, A CORPORATION OF NEW YORK.

THERMOSTAT.

Specification of Letters Patent. Application filed March 1a,1907.-

Patented Aug. 6, 1907. Serial No. 862,185. v

To all whom it may concern:

Be it known that I, SoHUYLER BRADLEY Pos'r, a citi- .zen of the United States, residing at Syracuse, in the county of Onondagaand State of New York, have invented certain new and useful Improvements in Thermostats; and I do herebydeclare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apv the thermostatic element.

pertains to make and use the same.

My invention consists in the novel features hereinafter described, reference being had to the accompanying drawing which illustrates one form in which I have contemplated embodyin'gmy invention and said invention is fully disclosed in the following description and claims. 1 7

Referring to said drawing, Figure 1 represents a front elevation of a thermostat embodying my invention. Fig. 2 is a similar view with the casing removed and clock mechanism thrown back. Fig. 3 is a rear View of the clock mechanism and connected parts, and the mechanism connected to the thermostatic element operated by the clock mechanism, for effecting the adjustment of the said element. Fig. 4 is a horizontal section on line 44, of Fig. 1, drawn to an enlarged scale, the clock case being shown in elevation. Fig. 5 is an enlarged detail view of the regulating device for My invention relates to thermostats for regulating heating apparatus in buildings, in which the thermostatic element is provided with adjusting mechanism operated by hand so that the controlled heating apparatus maybe operated when different and predetermined temperatures are reached in the room in which the thermostat is located, and it consists in combining with such a thermostat, a clock controlled mechanism for operating the adjusting mechanism which is normally operated by hand, at a predetermined time and to a predetermined point, as will hereinafter more fully appear.

In the drawings I have shown my invention in connection with one of the ordinary forms of electric thermostat, now on the market, and which is illustrated in such detail as is necessary for a full and complete understanding of my invention.

A represents the main frame of a thermostat, having a detachable case A, upon the exterior of which a thermometer a is conveniently arranged, the case being provided with apertures to permit the air of the room in which it is located, to have access to the interior.

13 represents the thermostatic element which consists in this instance of a compound metallic strip, composed preferably of brass and steel, or other two metals ofdiffering expansive qualities. One end of the strip B is permanently secured to a stud b, carried on a pivoted plate b secured to the frame ,A and capabie of being adjusted on its pivot by a cam b on a cam shaft b mounted in the frame A, and provided with a thumb piece b by'which the said shaft and cam may be operated. The cam shaft 1) is also provided with a pointer b which plays over a scale I), having ascale indicated thereon, referable to the thermometer, and provided with the 1 indicating words cooler and warmer as shown. The free end of trip B lies between two adjustable contacts 0 and O which are insulated from each other and provided with screws 0, c for attaching suitable wires forming part of the circuits controlled said thermostat.

The specific construction forms no part of my present invention.

Let it be supposed that when the pointer b is in the central position on the scale as shown in Figs. 1 and 2, the thermostat will operate to maintain the temperature of the room, in which it is located, at a medium temperature, say

tained and if turned to the right a higher temperature is maintained.

In using a thermostat of the character just described, it is customary especially where it is located inor adjacent to a sleeping apartment, to turnthe regulator shaft b to the left at night in order that a lower temperature may be maintained during the night, and to turn the regulator to the right at an early hour in the morning so that the apartment may be warmed quickly. This necessitates the inconvenience of arising and manually operating the regulator in a comparatively cold room, and it is this inconvenience which my invention is chiefly designed to obviate, although the invention may be used for any other purposes for which it may be desirable.

In carrying out myinvention I attach to the main frame of the thermostat a plate D, which preferably extends below the same and is provided at one side with the hinge lugs d d and at the other side with a spring catch d. The shaft 1)? of the regulator is provided with an operating arm a, connected by an adjustable link 6 to a push rod E mounted in a suitable guide e on the plate D, and provided at its lower end with a friction roller e F represents an ordinary alarm clock of small size, on

the back of which is preferably secured a frame, in the form of a ring f, catch lug f The hinge lugs f are secured to the hinge lugs d d of plate D by a hinge rod j, thus hinging the clock case to the plate D, and the clock may be rigidly secured in operative position by engaging the catch lug f with the spring catch d as shown in Fig. 4. On' the back of the clock or its supporting frame f is an oscillating plate or arm G, pivoted at g and connecte'd by a link g to an arm 9 which is connected to of the thermostat itself F. Then if the cam shaft is .turned to the left, a lower temperature will be mainprovided with hinge lugs f f and a V the winding stud of the ordinary alarm mechanism of theclock, which stud is provided with the usual winding thumb piece 9 Upon the oscillating plate G is pivoted an adjustable'trip arm H provided with a trip lug h, which is bent angularly thereto, into position to engage the roller e of the push rod E, as will be clearly understood from -the drawin'gs. The trip arm H is adjusted with respect to the oscillating plate G, by means of a screw h pivdtally secured to the trip arm and provided with a nut h located in a yoke, or slotted plate k which is pivoted to the oscillating plate G. Tlre'trip arm'H also carries a pointer h which is bent .trver the outer face of the oscillating plate G, and

works over a scale on said oscillating plate, the graduations of which exactly correspond with those on the scale I). The clock .inechanism is also provided with an additional hand or pointer shown at X, Fig. 1, which may be set to different positions on the dial, so as to trip the alarm mechanism, in the ordinary manner at the designated hour.

The normal position of the parts is shown in full lines, Fig. 3, and when it is desired to set the mechanism, the winding thumb piece 9 is turned so as to move the arnr 9 through 180 (or a half circle) thus winding the spring of the normal alarm mechanism and restoring the tripping arm and oscillating plate to their normal positions. This is necessary andimportant, as it leaves ,the mechanism of the thermostat free to be adjusted by -hand, at all times except during the actual operation of the clock operated mechanism when tripped. It will also be seen that when the clock mechanism is tripped attlie time for which it is set, the arm 9 will swing back through 180, thus forcing the tripping arm H into engagement with the push rod E and operating the cam shaft b and adjusting the thermostatic element, (all of which is accomplished during the first 90 of movement of the arm 9 and the parts are then returned to normal position, during the last 90 of-the movement of said arm 9 It will also be seen that the amount of adjustment given to the regulator is accurately determined by the adjustment of the trip arm H with respect to the oscillating plate G. For ex ample ii it is desired to increase the temperature to 75 at a given hour, as say six oclock'a. m., the hand X having been set for six oclock, the trip arm H is adlusted by Ineansoi the nut -to such a positionon its lator.

scale, as corresponds to the position of the pointer b on the scale b to indicate and the apparatus is set by turning-the winding thumb piece 9 so as to Wind its adlusting spring. The operator may then manually set the thermostat regulator, to maintain say 60 during the night and at six oclock the following morning the alarm spring will be released, the trip arm H will be actuated and the cam shaft will be turned to move the pointer b to a position indicating 75.

While I haveshown an ordinary alarm clock emp yed With my improved mechanism for reasons of economy, it is obvious that aspecial clock mechanism ay be provided having a special actuating mechanism for the arm 9 if desired. I find, however, that the ordinary alarm clock answers the purpose and I ordinarily remove the usual bell and hammer of the alarm apparatus, to prevent the additional noise thereof when the time mechanism operates to set the regube swung outwardly to give access to the winding and setting mechanism whichas usual is located at the rear of the clock case.

What I claim and desire to secure by Letters Patent is:- L v 1. The combination with a thermostat provided with manually operated regulating mechanism, eta time mech-' anism, actuating devices controlled thereby and adjustable connections between said actuating devices and said regulating mechanism for operating the latter at a predetermined time and to a predetermined extent, substantially as described. a

:5. The combination with a thermostat provided with manually operated regulating mechanism, of a time mechanism, actuating devices controlled thereby and adjustable connections between said actuating devices and said regulating mechanism said connections being constructed to permit the free operation of the regulating mechanism by hand, substantially as described.

3. The combination with a thermostat provided with manually operated. regulating mechanism, of a time mechanism, actuating devices controlled thereby and connections between said actuating devices and said regulating mechanism, said connections being constructed to permit the free operation of the regulating mechanism by hand at all times, substantially as described.

4. The combination with a thermostat provided with manually operated regulating mechanism, of a time mechanism, actuating devices controlled thereby and connections between said actuating devices and said regulating mechanism, said connections beingnormally separated at one point, to permit the regulating mechanism to be adjusted by hand at all times, substantially as described.

5. The combinationwith a thermostat provided with a manually operated regulating mechanism, of a'time mechanism, an actuating mechanism controlled thereby, a part operatively'connected with said actuating mechanism, a trip arm adjustably connected with said part, and devices connected with said regulating mechanism, having a part normally out of engagement with said trip arm, but located in the path thereof, siibstantially as described.

6. The combination with a thermostat provided with a manually operated regulating mechanism, of a time mechanism, an actuating mechanism controlled thereby, a trip arm connectedwith said actuating mechanism, lying normally out of operative position, and constructed to be moved into and out of operative position, by a single operatio'n of said actuating mechanism, and devices connected with the regulating mechanism having a part normally out of engagement with said trip arm, but located in the path thereof, substantially as described.

7. The combination with a thermostat provided with a manually operated regulatingmechanism, of a time mechanism, an actuating mechanism controlled thereby, an oscillating device operatively connected to said actuating mechanism, a trip arm movably connected to said oscillating part, and lying normally in inoperative position, the connection between said oscillating part and said actuating mechanism being constructed to move said trip arm into and out of operative position at a single actuation, an adjusting device carried by said oscillating part, for adjusting the trip arm with respect thereto, to correspond with the desired and predetermined adjustment otthe regulating mechanism, and devices connected with said regulatingtrip arm connected with said plate, a push rod, having a part normally out of engagement with said trip arm but located in the path of the same, and connections between said push rod and the said regulating mechanism, substan tially as described. I u I 9. The combination with a thermostat having an adjustable thermostatic element, and a hand operated regulating device therefor, of a clock casing hinged to the thermostat frame, at one side, a locking device for holding said clock tively connected to said actuating spring, a trip arm adjustably mounted on said oscillating part, a push rod,

SCHUYLER BRADLEY POST.

Witnesses:

BENJAMIN C. WICKES, I A. L. SMITH. 

